在Laravel 5.4上使用php artisan make:auth迁移错误
[Illuminate\Database\QueryException] SQLSTATE[42000]: Syntax error or access violation: 1071 Specified key was too long; max key length is 767 bytes (SQL: alter tabl e users add unique users_email_unique(email)) [PDOException] SQLSTATE[42000]: Syntax error or access violation: 1071 Specified key was too long; max key length is 767 bytes
当前回答
推荐的解决方案是启用MySQL的innodb_large_prefix选项，这样你就不会陷入后续的问题。下面是如何做到这一点:
打开my.ini MySQL配置文件，并像这样在[mysqld]行下添加以下行。
[mysqld]
innodb_file_format = Barracuda
innodb_large_prefix = 1
innodb_file_per_table = ON
之后，保存更改并重新启动MySQL服务。
如果需要回滚，然后重新运行迁移。
如果您的问题仍然存在，请转到数据库配置文件并设置
'engine' => null, to 'engine' => 'innodb row_format=dynamic'
希望能有所帮助!
其他回答
模式:defaultStringLength (191);将默认定义所有字符串191的长度，这可能会破坏您的数据库。你不能走这条路。
只需在数据库迁移类中定义任何特定列的长度。例如，我在CreateUsersTable类中定义了“name”，“username”和“email”，如下所示:
public function up()
{
Schema::create('users', function (Blueprint $table) {
$table->increments('id');
$table->string('name', 191);
$table->string('username', 30)->unique();
$table->string('email', 191)->unique();
$table->string('password');
$table->rememberToken();
$table->timestamps();
});
}
首先删除本地主机中数据库的所有表
更改Laravel默认数据库(utf8mb4)在config/database.php文件中的属性为:
'charset' => 'utf8'， 'collation' => 'utf8_unicode_ci'，
之后 更改我的本地数据库属性utf8_unicode_ci。 PHP工匠迁移 没关系。
在database.php
-添加这一行:
引擎=>无害的ROW_FORMAT=动力，
尝试使用默认字符串长度125 (MySQL 8.0)。
defaultStringLength (125)
如前所述，我们在App/Providers中添加到AppServiceProvider.php
use Illuminate\Support\Facades\Schema; // add this
/**
* Bootstrap any application services.
*
* @return void
*/
public function boot()
{
Schema::defaultStringLength(191); // also this line
}
你可以在下面的链接中看到更多细节(搜索“索引长度& MySQL / MariaDB”) https://laravel.com/docs/5.5/migrations
BUT WELL THAT's not what I published all about! the thing is even when doing the above you will likely to get another error (that's when you run php artisan migrate command and because of the problem of the length, the operation will likely stuck in the middle. solution is below, and the user table is likely created without the rest or not totally correctly) we need to roll back. the default roll back will not work. because the operation of migration didn't like finish. you need to delete the new created tables in the database manually.
我们可以这样做使用修补器如下所示:
L:\todos> php artisan tinker
Psy Shell v0.8.15 (PHP 7.1.10 — cli) by Justin Hileman
>>> Schema::drop('users')
=> null
我自己有一个问题与用户表。
之后你就可以开始了
PHP artisan migrate:回滚
PHP工匠迁移
